List of Superfund sites in Washington (state)

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Outline of map of Washington with colored dots representing the location of Superfund sites in the state
A map of superfund sites in Washington.

This is a list of Superfund sites in Washington State designated under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA) environmental law. The CERCLA federal law of 1980 authorized the United States Environmental Protection Agency (EPA) to create a list of polluted locations requiring a long-term response to clean up hazardous material contaminations.[1]

These locations are known as Superfund sites, and are placed on the National Priorities List (NPL). The NPL guides the EPA in "determining which sites warrant further investigation" for environmental remediation.[2] As of May 1, 2010, there were 48 Superfund sites on the National Priorities List in Washington.[2] Seventeen others have been cleaned up and removed from the list; no sites are currently proposed for addition.[2]

Superfund sites[edit]

  Deleted from National Priorities List
CERCLIS ID Name County Reason Proposed Listed[3] Construction
WAD009045279 Alcoa (Vancouver Smelter) Clark Soil and groundwater contaminated by fluoride and cyanide and soil also contaminated by alumina.[7] 06/24/1988 02/21/1990
WAD057311094 American Crossarm & Conduit Co. Lewis Ground water, soil, and sediments were contaminated with PCP and creosote. The soil also contained dioxins.[8][9][10] 06/24/1988 10/04/1989
WAD980833065 American Lake Gardens/McChord Air Force Base Pierce Shallow groundwater is contaminated with VOCs, including TCE and DCE.[11][12][13] 09/08/1983 09/21/1984
WA5170027291 Bangor Naval Submarine Base (US Navy) Kitsap Groundwater, soils, surface water, and sediments contain TNT and RDX.[14][15][16] 07/14/1989 08/30/1990
WA7170027265 Bangor Ordnance Disposal (US Navy) Kitsap Groundwater, soil, leachate and surface water contaminated by TNT and RDX; soil contaminated by lead.[17] 101/5/1984 07/22/1987
WA1891406349 Bonneville Power Administration Ross Complex (USDOE) Clark Soil was contaminated by PCBs, PAHs, PCP, lead and other heavy metals. Groundwater contains elevated levels of DCE and chloroform.[18] 07/14/1989 11/21/1989
WAD009624453 Boomsnub/Airco Clark Groundwater contaminated by chromium and VOCs, including TCE, PCE and freon-11. Soil on Boomsnub site contaminated by hexavalant chromium.[19] 01/18/1994 04/25/1995
WAD980836662 Centralia Municipal Landfill Lewis Groundwater contains elevated levels of chloride and heavy metals including manganese, arsenic and iron. Leachate has drained into nearby rivers.[20] 06/24/1988 08/30/1990
WAD980514541 Colbert Landfill Spokane Soil and groundwater contamination from VOCs dumped on site, including methylene dichloride and TCA.[21] 12/30/1982 09/08/1983
WAD980726368 Commencement Bay, Near Shore/Tide Flats Pierce At the Asarco smelter, metals including arsenic, cadmium, copper and lead were released into the soil, air and bay and metals from slag have migrated to surface and groundwater. Soil in the Ruston/North Tacoma study area is contaminated by arsenic and lead. Soil, surface water and groundwater across most of the Tacoma Tar Pits site is contaminated by metals, PAHs, PCBs, and VOCs including benzene, from a former coal gasification plant and recycling operations. Ship building, oil refining, chemical manufacture and storage and other industrial activity has contaminated the land and sediments of the bay with hazardous waste.[22] 12/30/1982 09/08/1983
WAD980726301 Commencement Bay, South Tacoma Channel Pierce In the Tacoma Landfill site, soil and groundwater are contaminated by VOCs and heavy metals; groundwater is also contaminated by PAHs. Groundwater at Well 12A is contaminated by VOCs and soil by VOCs and lead. Industrial activities at South Tacoma Field led to soil contamination by lead, arsenic, copper and PCBs and groundwater contamination by VOCs and petroleum hydrocarbons.[23] 12/30/1982 09/08/1983
WA9571924647 Fairchild Air Force Base (4 Waste Areas) Spokane Groundwater, soil and sediments are contaminated by VOCs (primarily TCE), semi-volatile organic compounds and inorganic compounds.[24] 06/24/1988 03/13/1989
WAD000643577 FMC Corp. (Yakima Pit) Yakima Groundwater and soil contamination by pesticides including DDT and derivatives, which were formerly dumped in a "poison pit" on site.[25] 12/30/1982 09/08/1983
WA9214053465 Fort Lewis (Landfill No. 5) Pierce Groundwater was contaminated by heavy metals and organic compounds.[26] 10/15/1984 07/22/1987
WA7210090067 Fort Lewis Logistics Center (US Army) Pierce Soil and shallow groundwater contamination by VOCs including TCE, DCE and PAHs.[27] 07/14/1989 11/21/1989
WAD053614988 Frontier Hard Chrome, Inc. Clark Groundwater and soil contaminated by trivalent chromium and high concentrations of hexavalent chromium.[28] 12/20/1982 09/08/1983
WAD001865450 General Electric Co. (Spokane Shop) Spokane On-site soil, groundwater and sludge contaminated by PCBs from electrical transformer repair and storage.[29] 06/24/1988 10/04/1989
WAD980514608 Greenacres Landfill Spokane Groundwater contains VOCs, semi-volatile organic compounds and heavy metals. The site is close to the sole-source aquifer for 400,000 people.[30] 09/08/1983 09/21/1984
WASFN1002174 Hamilton/Labree Roads GW Contamination Lewis Shallow drinking water aquifer contaminated by PCE and its decomposition products, and by tetrahydrofuran and methylene chloride. There are also very low levels of PCE contamination in soil and sediments.[31] 05/11/2000 07/27/2000
WA5210890096 Hamilton Island Landfill (USA/COE) Skamania Investigation showed that hazardous substances present did not pose a risk to human health or the environment.[32] 07/29/1991 10/14/1992
WA3890090076 Hanford 100-Area (USDOE) Benton Soils contaminated by radiological and chemical waste from plutonium manufacture for the Manhattan Project and subsequent activities. Groundwater contaminated by strontium-90, carbon-14, tritium and hexavalent chromium and discharges into the Columbia River, which is the water supply for over 170,000 people.[33] 06/24/1988 10/04/1989
WA1890090078 Hanford 200-Area (USDOE) Benton Groundwater and soil contamination by tritium, uranium, cyanide, carbon tetrachloride, technetium and other substances from processing, finishing and managing nuclear materials including plutonium for nuclear weapons.[34] 06/24/1988 10/04/1989
WA2890090077 Hanford 300-Area (USDOE) Benton Groundwater contamination by uranium, VOCs, strontium-90 and tritium from nuclear fuel fabrication. Soil contamination by uranium, cobalt-60, copper, PCBs, chromium and possibly other substances. Uranium and TCE have been detected in groundwater adjacent to the Columbia River, which is used for drinking water for over 170,000 people.[35] 06/24/1988 10/04/1989
WA4890090075 Hanford 1100-Area (USDOE) Benton Wells contaminated by VOCs including TCE and soil by asbestos, heavy metals and PCBs from maintenance activities.[36] 06/24/1988 10/04/1989
WAD980722839 Harbor Island (Lead) King Groundwater contains benzene, ethylbenzene, xylene, mercury, cadmium, lead and zinc but is not a source of drinking water. Soil is contaminated primarily by heavy metals, PCBs and petroleum and sediments near the island by heavy metals, PAHs, tributyl tin and PCBs.[37] 12/30/1982 09/08/1983
WAD980511539 Hidden Valley Landfill (Thun Field) Pierce Groundwater and leachate contaminated by metals, VOCs and nitrates.[38] 06/10/1986 03/31/1989
WA3170090044 Jackson Park Housing Complex (US Navy) Kitsap Soil contamination by arsenic, cadmium, chromium, copper, lead, nickel, zinc, TNT, DNT, trinitrobenzene and dinitrobenzene from former ordnance operations. Offshore sediments contain abandoned ordnance.[39] 06/23/1993 05/31/1994
WAD000065508 Kaiser Aluminum Mead Works Spokane Cyanide and fluoride contamination of groundwater and leachate.[40] 12/30/1982 09/08/1983
WAD050075662 Lakewood Site Pierce Groundwater and soil contamination by TCE and PCE from dry cleaning operations.[41] 12/30/1982 09/08/1983
WAN001002655 Lockheed West Seattle King Past industrial practices have contaminated sediment with heavy metals including arsenic, chromium, copper, lead, silver and zinc, with butyl tins and with PCBs and PAHs.[42][43] 09/29/2006 03/07/2007
WA0002329803 Lower Duwamish Waterway King Sediment contamination by mercury, arsenic, other heavy metals, PCBs, PAHs, dioxins, furans and phthalates.[44][45][46] 12/01/2000 09/13/2001
WA8570024200 McChord Air Force Base (Wash Rack/Treat) Pierce A layer of benzene-contaminated fuel emulsion is sitting on top of the water table. Benzene levels in the groundwater have now fallen below EPA safe drinking water levels.[47] 10/15/1984 07/22/1987
WAD980511661 Mica Landfill Spokane Groundwater contains VOCs, heavy metals and phenols from licensed hazardous waste disposal. Leachate contamination by inorganic ions, metals and at least twenty regulated organic compounds. Methane is accumulating at potentially explosive levels.[48] 10/15/1984 06/10/1986
WAD980978753 Midnite Mine Stevens Surface water, groundwater, soil and sediments contamination by metals and radionuclides from former uranium ore mining. Mine drainage is acidic.[49] 06/22/1999 05/11/2000
WAD980638910 Midway Landfill King Groundwater contamination by heavy metals and VOCs; landfill gas emissions contaminated by VOCs. Risks associated with heavy metals are now under control; groundwater VOCs are greatly reduced; gas VOCs have been addressed.[50] 10/05/1984 06/10/1986
WAD988466355 Moses Lake Wellfield Contamination Grant Groundwater TCE contamination, including municipal and private wells. Wells within Federal drinking water standards have now been constructed.[51] 07/29/1991 10/14/1992
WA5170090059 Naval Air Station, Whidbey Island (Ault) Island Ault Field groundwater is contaminated by VOCs including TCE and TCA. Soils and sediments are contaminated by PCBs, heavy metals, pesticides, PAHs and dioxins.[52] 09/18/1985 02/21/1990
WA6170090058 Naval Air Station, Whidbey Island (Seaplane) Island Soil in areas of the seaplane base was contaminated by heavy metals including lead and arsenic, pesticides and PAHs. Contaminated soil has been removed; possible remaining groundwater, surface water and sediment contamination is not thought to pose a risk to human health or the environment.[53] 09/18/1985 02/21/1990
WA1170023419 Naval Undersea Warfare Station (4 Areas) Kitsap Soil, sediments and groundwater contamination by PCBs, petroleum hydrocarbons, heavy metals and VOCs from base operations. Chemical contamination of local shellfish is no longer at levels that cause health concern but the area is closed to shellfishing because of sewage contamination from other sources.[54] 06/10/1986 10/04/1989
WAD000641548 North Market Street Spokane Groundwater and soil contamination by petroleum compounds, PAHs and VOCs from former petroleum refiny.[55] 06/24/1988 03/30/1990
WAD980511778 Northside Landfill Spokane Groundwater and domestic well contamination by organic solvents including PCE from former landfill practices. On-site sludge contains TCE and PCE. The aquifer below the site contains VOCs and is the sole drinking water source for the city of Spokane[56] 10/15/1984 06/10/1986
WAD980833974 Northwest Transformer Whatcom Soil contaminated by PCBs has now been removed.[57] 10/15/1984 06/10/1986
WAD027315621 Northwest Transformer (South Harkness St) Whatcom Soil and buildings were contaminated by PCBs and heavy metals including arsenic, cadmium and lead.[58] 06/24/1988 02/21/1990
WAD980982557 Old Inland Pit Spokane Soil contains elevated levels of heavy metals from dumping of foundry waste in a former gravel pit. Groundwater contamination is at low levels and monitoring continues.[59] 06/10/1986 02/21/1990
WAD008957243 Oeser Co Whatcom Soil and groundwater contamination by creosote, PCP, carrier oil and dioxins from former and ongoing wood treatment operations.[60] 12/23/1996 09/25/1997
WA8680030931 Old Navy Dump/Manchester Lab (USEPA/NOAA) Kitsap Former US Navy site. Firefighting training contaminated soil with dioxins and petroleum hydrocarbons. Hydraulic erosion of a landfill area contaminated sediments and shellfish in Clam Bay with PCBs, copper, lead and zinc. Seeps from the landfill contained elevated levels of copper, nickel, zinc and PCBs.[61][62] 01/18/1994 05/31/1994
WAD009249210 Pacific Car & Foundry Co. King Soil was contaminated by heavy metals, PAHs and PCBs from former manufacturing facility. Groundwater contamination by heavy metals, petroleum products and solvents. Around 37,000 people obtain drinking water from wells within three miles of the site.[63] 06/24/1988 02/21/1990
WAD009248287 Pacific Sound Resources King Soil and groundwater contamination by PCP, PAHs and heavy metals from former wood treatment operations. Marine sediment contamination, primarily by PAHs, has contaminated seafood.[64] 05/10/1993 05/31/1994
WA0000026534 Palermo Well Field Ground Water Contamination Thurston Groundwater and surface water contaminated by PCE from a dry cleaning business and TCE from former and current Washington DOT facilities. Three contaminated municipal drinking water wells have been closed.[65] 12/23/1996 04/01/1997
WAD991281874 Pasco Sanitary Landfill Franklin Groundwater contamination by VOCs, including TCE, toluene and xylene from former landfill practices.[66] 06/24/1988 02/21/1990
WAD120513957 Pesticide Lab (Yakima) Yakima A waste pipe and on-site septic tank that carried a risk of contaminating groundwater have been removed.[67] 12/30/1982 09/08/1983
WA4170090001 Port Hadlock Detachment (US Navy) Jefferson Shellfish next to a former landfill contain elevated levels of heavy metals and pesticides. Another possibly contaminated area was found not to pose a risk.[68] 06/23/1993 05/31/1994
WA2170023418 Puget Sound Naval Shipyard Complex Kitsap Soil, sediment and groundwater contamination by petroleum hydrocarbons, heavy metals, VOCs and PCBs. Groundwater flows into the Sinclair Inlet where it is a hazard to tribal fishermen, marine life and recreational users.[69] 05/10/1993 05/31/1994
WAD980511745 Queen City Farms King Former landfill site. Groundwater, surface water and sludge contamination by VOCs (including TCE and DCE); residential wells contaminated by arsenic. Soil contamination by PCBs and metals. Groundwater contamination is currently contained on-site.[70] 09/08/1983 09/21/1984
WAD980639215 Quendall Terminals King Soil and groundwater contamination by PAHs, benzene and creosote products from former creosote manufacturing plant. Contaminant release to Lake Washington is a concern and could affect wildlife, including chinook salmon, a federal threatened species.[71] 09/14/2005 04/19/2006
WAD980639462 Seattle Municipal Landfill (Kent Highlands) King Landfill gas contains VOCs including toluene, xylene, vinyl chloride, and TCE. Groundwater is contaminated with VOCs and heavy metals.[72][73][74] 06/24/1988 08/30/1990
WAD980722789 Silver Mountain Mine Okanogan Soil and surface water contamination by arsenic and cyanide from former silver and gold mining. Cyanide has been neutralized, contaminated water removed and taillings consolidated and capped.[75] 10/15/1984 06/10/1986
WAD981767296 Spokane Junkyard/Associated Properties Spokane The junkyard contained asbestos, oil contaminated with PCBs, flammable materials and VOCs. Soil was contaminated with lead and PCBs.[76] 10/14/1992 05/31/1994
WAD980723506 Toftdahl Drums Clark Surface water, groundwater and soil were contaminated by heavy metals and PCBs from used drum cleaning facility.[77] 10/15/1984 06/10/1986
WAD980639256 Tulalip Landfill Snohomish Groundwater, wetlands and sloughs were contaminated with heavy metals including lead, copper, chromium and cadmium from former dumping of commercial, industrial and hospital waste. On-site leachate and surface water was contaminated by heavy metals, PCBs, and VOCs including toluene and xylene. Leachate, surface water and slough water was contaminated by multiply resistant pathogens.[78] 07/29/1991 04/25/1995
WAD988519708 Vancouver Water Station#1 Contamination Clark Groundwater contamination by PCE from an unknown source. Wells supply up to 20 million gallons of drinking water per day to Vancouver, Washington and Clark County, which is treated to remove PCE before supply.[79] 06/23/1993 05/31/1994
WAD988475158 Vancouver Water Station#4 Contamination Clark Groundwater contamination by PCE, suspected to come from dry cleaning operations. Treatment facilities remove PCE from drinking water before supply.[80] 07/29/1991 10/14/1992
WAD009487513 Western Processing Company, Inc. King Former industrial waste processing facility. Groundwater and sediment contamination by VOCs, phenols and heavy metals. Soil was contaminated by VOCs, PCBs, phenols and metals. VOCs and metals detected in surface water.[81] 12/30/1982 09/08/1983
WAD009248295 Wyckoff Co./Eagle Harbor Kitsap Former wood treatment facility and shipyard. Soil, groundwater and seaps onto beaches contain elevated levels of PAHs, PCBs, dioxins and furans. Marine sediments contain PAHs, mercury (element), other metals and PCBs. There are also pools of liquid contaminants on the harbor bottom.[82] 09/18/1985 07/22/1987
WAD040187890 Yakima Plating Co. Yakima Groundwater contained low levels of heavy metals including copper, lead and zinc.[83] 06/24/1988 03/31/1989
Site ID 77319379 Grain Handling Facility at Freeman Spokane The grain handling facility at Freeman has leached carbon tetrachloride into soil and groundwater.

See also[edit]

External links[edit]


  1. ^ P.L. 96-510, 42 U.S.C. §§ 96019675), December 11, 1980.
  2. ^ a b c "National Priorities List". United States Environmental Protection Agency. Retrieved 2010-05-01.
  3. ^ "Final NPL sites". EPA. Retrieved 2010-05-01.
  4. ^ "Construction Completions at NPL sites". EPA. Retrieved 2010-05-01.
  5. ^ "Partial deletions at NPL sites". EPA. Retrieved 2010-05-01.
  6. ^ "Deleted NPL sites". EPA. Retrieved 2010-05-01.
  7. ^ "ALCOA (Vancouver Smelter)". EPA. Retrieved 2010-05-01.
  8. ^ "American Crossarm & Conduit Co. site description". Retrieved 2009-12-21.
  9. ^ "American Crossarm & Conduit Co. NPL site narrative". Retrieved 2009-12-21.
  10. ^ "American Crossarm & Conduit Co. Superfund site progress profile". Archived from the original on 2012-02-22. Retrieved 2009-12-21.
  11. ^ "American Lake Gardens/McChord Air Force Base site description". Retrieved 2009-12-19.
  12. ^ "American Lake Gardens/McChord Air Force Base NPL site narrative". Retrieved 2009-12-19.
  13. ^ "American Lake Gardens/McChord Air Force Base Superfund site progress profile". Archived from the original on 2012-02-22. Retrieved 2009-12-19.
  14. ^ "Bangor Naval Submarine Base site description". Retrieved 2009-12-21.
  15. ^ "Bangor Naval Submarine Base NPL site narrative". Retrieved 2009-12-19.
  16. ^ "Bangor Naval Submarine Base Superfund site progress profile". Archived from the original on 2011-07-28. Retrieved 2009-12-19.
  17. ^ "Bangor Ordnance Disposal (US Navy)". EPA. Retrieved 2010-05-01.
  18. ^ "Bonneville Power Admin Ross (USDOE)". EPA. Retrieved 2010-05-01.
  19. ^ "Boomsnub/Airco". EPA. Retrieved 2010-05-01.
  20. ^ "Centralia Municipal Landfill". EPA. Retrieved 2010-05-01.
  21. ^ "Colbert Landfill". EPA. Retrieved 2010-05-01.
  22. ^ "Commencement Bay, Near Shore/Tide Flats". EPA. Retrieved 2010-05-01.
  23. ^ "Commencement Bay, South Tacoma Channel". EPA. Retrieved 2010-05-01.
  24. ^ "Fairchild Air Force Base (4 Waste Areas)". EPA. Retrieved 2010-05-01.
  25. ^ "FMC Corp. (Yakima Pit)". EPA. Retrieved 2010-05-01.
  26. ^ "Fort Lewis (Landfill No. 5)". EPA. Retrieved 2010-05-01.
  27. ^ "Fort Lewis Logistics Center". EPA. Retrieved 2010-05-01.
  28. ^ "Frontier Hard Chrome, Inc". EPA. Retrieved 2010-05-01.
  29. ^ "General Electric Co. (Spokane Shop)". EPA. Retrieved 2010-05-01.
  30. ^ "Greenacres Landfill". EPA. Retrieved 2010-05-01.
  31. ^ "Hamilton/Labree Roads Ground Water Contamination". EPA. Retrieved 2010-05-01.
  32. ^ "Hamilton Island Landfill (USA/COE)". EPA. Retrieved 2010-05-01.
  33. ^ "Hanford 100-Area (USDOE)". EPA. Retrieved 2010-05-01.
  34. ^ "Hanford 200-Area (USDOE)". EPA. Retrieved 2010-05-01.
  35. ^ "Hanford 300-Area (USDOE)". EPA. Retrieved 2010-05-01.
  36. ^ "Hanford-1100 Area (USDOE)". EPA. Retrieved 2010-05-01.
  37. ^ "Harbor Island". EPA. Retrieved 2010-05-01.
  38. ^ "Hidden Valley Landfill (Thun Field)". EPA. Retrieved 2010-05-01.
  39. ^ "Jackson Park Housing Complex (US Navy)". EPA. Retrieved 2010-05-01.
  40. ^ "Kaiser Aluminum Mead Works". EPA. Retrieved 2010-05-01.
  41. ^ "Lakewood Site". EPA. Retrieved 2010-05-01.
  42. ^ "Lockheed West Seattle site narrative". EPA. Retrieved 2010-05-03.
  43. ^ "Lockheed West Seattle site progress profile". EPA. Archived from the original on 2011-06-16. Retrieved 2010-05-03.
  44. ^ "Lower Duwamish Waterway Site". EPA. Retrieved 2010-05-03.
  45. ^ "Lower Duwamish Waterway site progress profile". EPA. Archived from the original on 2011-06-16. Retrieved 2010-05-03.
  46. ^ "Lower Duwamish Waterway Questions and Answers". EPA. Retrieved 2010-05-03.
  47. ^ "McChord Air Force Base (Wash Rack/Treat)". EPA. Retrieved 2010-05-01.
  48. ^ "Mica Landfill". EPA. Retrieved 2010-05-03.
  49. ^ "Midnite Mine". EPA. Retrieved 2010-05-03.
  50. ^ "Midway Landfill". EPA. Retrieved 2010-05-03.
  51. ^ "Moses Lake Wellfield Contamination". EPA. Retrieved 2010-05-03.
  52. ^ "Naval Air Station, Whidbey Island (Ault)". EPA. Retrieved 2010-05-01.
  53. ^ "Naval Air Station, Whidbey Island (Seaplane)". EPA. Retrieved 2010-05-01.
  54. ^ "Naval Undersea Warfare Station (4 Areas)". EPA. Missing or empty |url= (help)
  55. ^ "North Market Street". EPA. Retrieved 2010-05-03.
  56. ^ "Northside Landfill". EPA. Retrieved 2010-05-03.
  57. ^ "Northwest Transformer (Mission Pole)". EPA. Retrieved 2010-05-01.
  58. ^ "Northwest Transformer(South Harkness St". EPA. Retrieved 2010-05-01.
  59. ^ "Old Inland Pit". EPA. Retrieved 2010-05-01.
  60. ^ "Oeser Co". EPA. Retrieved 2010-05-03.
  61. ^ "Old Navy Dump/Manchester Lab (USEPA/NOAA)". EPA. Retrieved 2010-05-03.
  62. ^ "Old Navy Dump/Manchester Lab (USEPA/NOAA) Superfund site progress profile". Archived from the original on 2011-06-15. Retrieved 2010-02-03.
  63. ^ "Pacific Car & Foundry Co". EPA. Retrieved 2010-05-03.
  64. ^ "Pacific Sound Resources". EPA. Retrieved 2010-05-03.
  65. ^ "Palermo Well Field Ground Water Contamination". EPA. Retrieved 2010-05-03.
  66. ^ "Pasco Sanitary Landfill". EPA. Retrieved 2010-05-03.
  67. ^ "Pesticide Lab (Yakima)". EPA. Retrieved 2010-05-01.
  68. ^ "Port Hadlock Detachment (US Navy)". EPA. Retrieved 2010-05-01.
  69. ^ "Puget Sound Naval Shipyard". EPA. Retrieved 2010-05-03.
  70. ^ "Queen City Farms". EPA. Retrieved 2010-05-03.
  71. ^ "Quendall Terminals". EPA. Retrieved 2010-05-03.
  72. ^ "Seattle Municipal Landfill (Kent Highlands) site description". Retrieved 2009-12-21.
  73. ^ "Seattle Municipal Landfill (Kent Highlands) NPL site narrative". Retrieved 2009-12-21.
  74. ^ "Seattle Municipal Landfill (Kent Highlands) Superfund site progress profile". Archived from the original on 2012-03-06. Retrieved 2009-12-21.
  75. ^ "Silver Mountain Mine". EPA. Retrieved 2010-05-01.
  76. ^ "Spokane Junkyard/Associated Properties]". EPA. Retrieved 2010-05-01.
  77. ^ "Toftdahl Drums". EPA. Retrieved 2010-05-01.
  78. ^ "Tulalip Landfill". EPA. Retrieved 2010-05-01.
  79. ^ "Vancouver Water Station #1 Contamination". EPA. Retrieved 2010-05-03.
  80. ^ "Vancouver Water Station #4 Contamination". EPA. Retrieved 2010-05-03.
  81. ^ "Western Processing Company, Inc". EPA. Retrieved 2010-05-03.
  82. ^ "Wyckoff Co./Eagle Harbor". EPA. Retrieved 2010-05-03.
  83. ^ "Yakima Plating". EPA. Retrieved 2010-05-01.